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Finding the Fourth Proportional to 512.56, 767.40 and 330.16

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Solution

The fourth proportional to 512.56, 767.40 and 330.16 is: 494.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.56 : 767.40 = 330.16 : x
  2. Step 2: Convert to fraction form
    512.56/767.40 = 330.16/x
  3. Step 3: Cross multiply
    512.56x = 767.40 × 330.16
  4. Step 4: Simplify right side
    512.56x = 253,364.78
  5. Step 5: Solve for x
    x = 253,364.78/512.56
  6. Step 6: Final answer
    x = 494.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.